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Science 15 December 2006:
Vol. 314. no. 5806, pp. 1709 - 1710
DOI: 10.1126/science.1137084

Perspective

NASA Returns Rocks from a Comet

Don S. Burnett

Cometary particles returned by the Stardust Discovery Mission are primarily silicate materials of solar system origin. Some of the grains were formed at high temperatures close to the Sun, but then transported far out to the Kuiper belt region of the solar system before being incorporated in the comet.

Department of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.

E-mail: burnett{at}gps.caltech.edu

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